UIWebView背景透明且无拖拽后的上下阴影

 

1.首先UIWebView背景透明

    // set background transparent, also can set it in nib file
    webView_.backgroundColor = [UIColor clearColor];
    webView_.opaque = NO;

2.隐藏拖拽webview时上下的两个有阴影效果的subview

    // remove shadow view when drag web view
    for (UIView *subView in [webView_ subviews]) {
        if ([subView isKindOfClass:[UIScrollView class]]) {
            for (UIView *shadowView in [subView subviews]) {
                if ([shadowView isKindOfClass:[UIImageView class]]) {
                    shadowView.hidden = YES;
                }
            }
        }
    }

其他
a.UIWebView加载本地html

    // get html file path
    NSString *path = [[NSBundle mainBundle] pathForResource:@"about" ofType:@"html"];
    [webView_ loadRequest:[NSURLRequest requestWithURL:[NSURL fileURLWithPath:path]]];

b.禁用UIWebView拖拽时的反弹效果

    // disable view bounce
    [(UIScrollView *)[[webView_ subviews] objectAtIndex:0] setBounces:NO];

c.禁用UIWebView拖拽

    // disable touch move
    <script type="text/javascript">
        document.ontouchmove = function(e) {
            e.preventDefault();
        }
    </script>

获取UIWebview加载的标题和内容代码：
titleLabel.text = [webView stringByEvaluatingJavaScriptFromString:@"document.title"];


NSString *source = [webView stringByEvaluatingJavaScriptFromString:@"document.body.innerHTML"];
 
获取网页的全部原数据：
NSString *html = [webView stringByEvaluatingJavaScriptFromString:
@"document.documentElement.outerHTML"];
 
读取某一div的内容：
    NSString *html = [myWebViewstringByEvaluatingJavaScriptFromString: 
@"document.getElementById('your div id').textContent"];
 
UIWebview缓存页面

[webView loadRequest: [NSURLRequest requestWithURL: [NSURL URLWithString: url] 
                                           cachePolicy: NSURLRequestUseProtocolCachePolicy 
                                       timeoutInterval: 3600.0]];